40 158 169 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁵

TF target 2⁷²

P-1

B1 =	475000
B2 =	11400000

Status	Date	User	Residue	Shift	Software
Verified	2008-04-04	Andreas Rueger	57B394A0AA5C133F	5517670	Windows,Prime95,v24 final,(aka Wc1)
Verified	2017-06-22	Dubslow	57B394A0AA5C133F	17866828	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2024-06-14	James Heinrich	NF	no factor TF: 68-69
2021-03-05	-anonymous-	NF	no factor TF: 74-75
2020-01-31	-anonymous-	NF	no factor TF: 73-74
2019-10-04	-anonymous-	NF	no factor TF: 72-73
2017-06-22	Dubslow	C-LL	57B394A0AA5C133F
2014-12-29	Sid & Andy	NF	no factor TF: 71-72
2014-12-17	NickOfTime	NF	no factor TF: 69-71
2013-11-08	Carsten Kossendey	NF	no factor TF: 68-69
2008-04-03	-anonymous-	C-LL	57B394A0AA5C133F
2008-01-15	-anonymous-	NF-PM1	B1=475000, B2=11400000
2006-12-18	Hazmattom	NF	no factor TF: 1-68
2006-07-10	-anonymous-	NF	no factor TF: 1-62
2002-08-31	-anonymous-	NF	no factor TF: 1-57